Dust-collector for vacuum-cleaners.



VV. H. KELLER.

DUST COLLECTOR ECR VACUUM CLEANERS.

APPLICATION FILED JAN.16,1909.

Patented Feb. 9, 1915.

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W. H. KELLER.

DUST COLLECTOR FOR VACUUM CLEANEH APPUGATION NLRB JAN. 1u, wm.

LQ'SQ.. v Fatented Feb. 9, 1915,

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WLLM E, KELLER, OF PHLAIELPHIA, PENNSYLVANIA, ASSIGNOR, BY MES'NESSIGNMENTS, T0 SANTO MANFACTURNG- COMPANY, OF PBLADELPHA, PENNSYLVANA,.A CIRPORATION OF DELWARE.

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Specification of etters Patent.

Patenten nen. e, relie.

Application tiled `anuar'y 1G, 1909. Serial No. 472,5?3.

To all whom it may concern:

Be it lmown that WILLIAM H. KELLER, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful improve ments in Dust-Collectors for Vacuum- Cleaners, whereofthe following is a specilication, reference being had to theaccompanying drawings.

My invention relates to a dust'collector whereby separation oi dust fromair may be eciently secured without the employment or' water. It isintended to be used in conjunction with vacuum cleaner apparatus of anywell known type. I have accordingly shown in the drawings neither thecleaning apparatus proper by which the suction is applied to the objectto be cleaned, nor the suction producing apparatua'but only theseparating device which is Vso interposed that the current of dust ladenair is compelled to pass through it, and whereby the dust is removedyfrom the air and collected.

ln my dust collector, l empio a dust collecting chamber, preferably oncylindrical form, with an aperture whereby the dust laden air iscompelled to enter the cylindrical chamber in tangential relationthereto, so as to be whirled around therein for a considerable periodbefore being drawn out, during which process gravity deprives it of moreor less of the dust, which is deposited at the bottom of the receptacle.This gravity separation is preferably combined with means foraccomplishing further separation by a screen or sieve, such as asuitable textile filter, and l have illustrated my invention as appliedin this combination.

ln the accompanying drawings, Figure l,

-- is a vertical sectional view or an apparatus embodying my invention.Fig. ll, is a horis rental section along the line ll, "il, or' Fig. l.lll, is a similar view along the line lll, lll, in Fig. l,

ln the drawings, my apparatus is built in forni et an upright cylinderl, provided in it, a bottoni Jibril vided horizontally by a diaphragm 4,into a lower cylindrical chamber 5, and an upper cylindrical chamber 6.This latter chamberis traversed axially from end to end by a pipe 7,which communicates at its upper end with a pipe 8, leading to a sourceof suction. The pipe 7 at its lower end after passing through thediaphragm 4, passesv through a disk l0, which supports a cylindricalwire frame l1, around which is applied a coveringl2, of suitablefiltering 1naterial, such as a finely woven textile, vlike cloth orlinen, the lower end of this covering being free to be drawn by suctionwithin the frame ll, as shown at 13, whereby the filtering area issomewhat increased. The lower chamber 5, within which this tilter ismounted, is provided with a cleaning aperture l5, fitted with a suitabledoor 16. Near the upper end of the chamber 5, is an aperture 17, ttedwith a pipe 18, which approaches the wall of the cylinder in tangentialrelation thereto, as shown in the drawings. :By suitable elbows andpipes l5), this pipe 18, is put in communication with a cylindrioal cap20, which communicates with the interior of the upper chamber 6, bymeans of a sleeve 2l, surrounding the pipe 7. 'lhis upper chamber 6,also has near its upper end, an aperture 27, fitted with a pipe 28,which approaches and enters the cylin der in tangential relationthereto, and which is in turn connected with the pipe leading to thecleaning apparatus. The upper chamber is also provided with a dustremoving aperture 29, protected by a door 30.

'lhe operation of my device is as iollows :-The pipe 8, having heenconnected with the source ot suction, and the pipe 2S, with the cleaningapparatus, the clust laden -air entering the upper chamber b, by the4pipe 28, and aperture il', is compelled by reason of thetangentialrelation otn this pipe to the cylindrical chamber to whirl around theupper part thereot for a considerable before ceptacle havin of the dustwhich it carries settles by gravity down upon the bottom of thischamber, and whence from time to time it may be removed by opening thedoor 30. The lair thus relieved of its heavier material, is drawnthrough the sleeve 21, the casing 20, the pipes 18, and 19, into thelower chamber 5, where it is again caused to whirl around for a certainlength of time by reason of the tangential relation of the pipe 18, tothe cylindrical chamber 5. During this whirling process the air losesmore or less dust andis then drawn through the filtering material 12,into the interior` of the hollow cylinder 11, and thence by way of the-pipe 7, to the source of suction. The filtering material deprives it ofthe balance of the dust which it carries which is gradually deposited atthe bottom of the chamber 3, whence it may be removed by Way of the door16.

`I find that the efiicacy of the device increased according as thesleeve 21, prolonged downwardly below the level ofthe tangential opening27. It may with advantage be made longer than `is shown in the drawings,especially as 'the height of the chamber is increased.

It is obvious .that my device is capable of various modifications. Thegravity chem-- ber maybe used by itself. If two chambers are used theyneed not be superimposed as shown, and the number of chambers may beincreased. The method and order .in which they communicate with eachother may be varied, the essential point of my invention being that inaddition to or apart from the ordinary cloth filtration, I provideaseparating chamber to which the air is led in suchl tangential relationas to be whirled around therein for a time before being drawn therefromin order to permit gravity to remove more or less of the dust which itcontains.

I prefer to arrangethe connection of the chambers so that gravityfiltration has first had full opportunity to cleanse the air be forepassing it through the filtering screen, as I find I am able in this'wayto rid the air of some 90% of its dust before it passes to the screen orfilter. In this way clogging of the filter is prevented, and a lessamount of suction enabled to do a greater amount of cleansing.

Having thus described my invention, I claim 1. In a dust separator, anupright receptacle, an intake for said receptacle connected thereto nearits upper end and in tangential relation to its axis, an axial suctionpipe connected to said receptacle at its upper'end and extending intosaid receptacle to a point below the level ot the intake, a second reJan intake connected near its upper end 1n tangential relation to itsaxis, an axial suction pipe entering `said secchambers adjacent itsupper end and arranged tangentially to the axis of said chamher, a.suction pipe connected to said chamber centrally thereof, an intakeconnected to the other chamber near its upper end, a pipe connectingsaid last named intake with the suction pipe of the first named chamber,a suction pipe connected to said last named chamber, and a filteringscreen surrounding the opening lof said last named-suction pipe.

' B. In a dust separator, a cylindrical receptacle, a partitionintermediate the ends vof said receptacle and dividing the seme intochambers, an intake connected to one of said chambers adjacent its upper.end and arranged tangentially to the axis of Said chamber, a suctionpipe connected to said Hchamber 'centrally thereof, an intake connectedto the other chamber near its upper end, a pipe connecting said lastnamed intake with the suction pipe of the rst named chamber, a suctionpipe connected to said last named chamber, a disk carried by said lastnamed suction pipe, la wire frame supported by said disk, and afiltering material carried by' said disk and surrounding said frame.

e. In a dust separator, a cylindrical cas ing, a horizontal partitionlocated intermediate the ends of said casing, an intake pipe connectedto said casing adjacent its upper eng, a suction pipe connected to theupper en of said casing and extending into the same to a point below theintake pipe, an intake connected to said receptacle at a point below andadiacent said partition, a

pipe connecting said last named intake with the suction pipe at theupperend of the receptacle, a suction pipe extending through said firstnamedsuction pipe and through said partition, and a filtering screensurrounding the opening in said suction pipe extending through thepartition.

Q5. 1n a dust separator, a cylindrical casing, a horizontalpartitionlocated intermediate the ends of said casing, an intake pipeconnected to said casing adjacent its upper end, a suction pipeconnected to the upper cnd of said casing and extending intothe .same toa point below the intake pipe, an

intake connected to said receptacle at a point below and adjacent saidpartition, a pipe connecting said last named intake with the suctionpipe at the upper end of the receptacle, a suction pipe extendingthrough said ist named suction pipe and through said signed my name,pmtiiion. n disk carried by the lower end n? said suction pipe extendingthrough `the partition. a wire frame carried by said disk. und nfiltering materia). surrounding said wire frume.

In resfimrmy whereof, I have hereunto at Philadelphia.. Pennsylvania.this thirteenth day of January, 1909.

WILLAM H. KELLER.

` Witnesses:

JAMES H. BELL, E. L. FULLERTON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, .Washington D. C.

